popen/system()

[HugoFromBOSS]

Hello,

I have beeen googling for hours and havent found the answer I am looking for so I have come to experts. I hope you can help!

FILE * snapshot;
char mystring [100];

snapshot = popen("screen -x svr00001", "r");
pclose(snapshot );
if (snapshot == NULL) {
perror ("Not running");
} else {
fgets (mystring , 100 , snapshot);
puts (mystring);
}

However, this "streams" the data that the "screen" command is running how do I get it to "print" out the last line being executed by the program?

Thanks in advance!

[Savage]

Hello,

I have beeen googling for hours and havent found the answer I am looking for so I have come to experts. I hope you can help!

FILE * snapshot;
char mystring [100];

snapshot = popen("screen -x svr00001", "r");
pclose(snapshot );
if (snapshot == NULL) {
perror ("Not running");
} else {
fgets (mystring , 100 , snapshot);
puts (mystring);
}

However, this "streams" the data that the "screen" command is running how do I get it to "print" out the last line being executed by the program?

Thanks in advance!

Why do you close the stream immediately after opening it?

[HugoFromBOSS]

To try and get it to only get a bit of data rather than streaming the execution of "screen"

[HugoFromBOSS]

I just want to be able to return part of the screen command in a varialbe and not the whole screen execution.

[HugoFromBOSS]

*bump* is there any way of doing this?

[rcronk]

I don't know if it's valid to perform operations on something that has been closed. Have you tried closing it after you are done with it? If so, what happened?

[HugoFromBOSS]

There is no diffrence its the same result.

[HugoFromBOSS]

Is there another way of getting the information of a program running on "screen" on C.

I want to be able to get the last few lines of an console based applciation using C. Is this possible?

[ppd]

Hi,
I am not sure I understand what you mean, but I will say a few things anyway.

If it is a command line program outputting text to the screen or console, can you run this program from the command line
and tell it to write to a file? E.G.
command.exe > file
Then you would have the output in a file which you could
read with a C program.

If it is a screenshot or image of the entire console that you need, then you can get a screen shot using a command in windows (look in the windows help). It is some key+"Print Screen" that saves a copy of the entire screen of your computer into an image file. Then you are on your
own to deal with that.

good luck.